Weighing-scale



T. H. HERNDON.

(No Model.)

WEIGHING SCALE.

No. 389,076. Patented Sept. 4, 1888.

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UNITED STATES PATENT Orrica.

THOMAS H. HERNDON, OF BIRMINGHAM, ALABAMA.

WEIGHING-SCALE.

SPECIFICATION forming part of Letters Patent No. 389,076, dated September 4, 1888.

Application filed Arril 19, 1888.

To all whom it may concern.-

Be it known that I, THOMAS H. HERNDON, a citizen of the United States, residing at Birmingham, in the county of Jefferson and State ofAlabam-a, have invented new and useful Improvementsin Weighing-Scales, of which the following is a specification.

My invention relates to platform and other types of weighing-scales, and the purpose thereof is to provide a simple and comparativel y inexpensive attachment therefor,whereby any weight may readily be ascertained from a minimum of one up to a maximum of many thousands of pounds.

It is my purpose also to make the indicating mechanism entirely automatic, and to so construct and organize the same as to render it adaptable to the weighing of both large and small articles, and to provide an attachment capable of connection with any platform-scale now in use without involving any material change or alteration therein.

The invention consists in the several novel features of construction and new combinations of parts hereinafter Lilly set forth, and then definitely pointed out in the claims.

In the accompanying drawings, Figure 1 is a front elevation of a platform-scale, showing my invention. Fig. 2 is a detail View, on a somewhat enlarged scale, showing the con struction of the index-arms and the manner of combining them with the scale-beam.

In the said drawings, 1 denotes the platform of a scale of ordinary construction, having an upright, 2,upon which is pivotally mounted the scale-beam 3, having the usual connections with the levers, by which the rise and fall of the platform are communicated to the scalebeam.

Rigidly mounted upon the upright 2, and upon the outer extremity of the arm 4 upon said upright, is a semicircular scale-plate, 5, having suitable graduations, as indicated. These divisions extend from the lower end of the plate over an arc of ninety degrees, at which point a second series of similar graduations commences and extends over a like extent of surface.

Bigidly attached to the semicircular plate 5 is a quadrant-shaped plate, 6, concentric with the semicircular plate and parallel with Serial No. 271,175. (No model.)

the upper half thereof. This plate 6 is divided into equal parts by suitable graduations, and the latter are so arranged that they have a certain relation in position and dimensions to the similar features of the plate 5.

Mounted upon a pivotal support, 7, beneath the end of the beam 3 is an index-hand, 8, moving over the lower half of the graduated plate 5. This arm normally hangs bygravity in a vertical position extending from the pivotal support 7, and rigidly united to the hand 8 is a second index-finger, 9, arranged at right angles to the vertical arm. This index 9 is of comparativelysmall diameter relatively to the hand 8, being preferably a light wire, and is mounted in a suitable sheath, 10, in which it is longitudinally adjustable, being held by a set-screw at any desired point. Upon the vertical hand is mounted a weight, 12, adjustable thereon and held at any point by a set-screw or other suitable means. The length of the adjustable finger 9 is such and the several parts are so arranged that said finger may either be extended outward to register with the outer graduated plate,6, or it may be drawn in and caused to register upon the upper half of the graduated plate 5.

The scale-beam 3 is connected by a wire or link, 13,with the pivot-ally-niounted right-angled indexes 8 and 9, whereby the several indications given by the scale are communicated to the said indexes and by them indicated on the graduated plates 5 and 6; or if the weight upon the platform is a moderate one, then the indication will be upon the inner plate, 5, only, and may be registered by either one of the two indexes 8 and 9.

If small objects or weights are to be uniformly Weighed,thc index 9 is shortened, so as to point at the inner scale-plate, 5; but ifheavier articlessuch as cars-are to be weighed, the index 9 is lengthened to point at the figures on the outer scale-plate, 6, andthe weight 12 is lowered, as in Fig. 2, for the purpose of increasing the weight and leverage of the index 8. The weight on the index 8 constitutes the counter-balance for the scale. \iVhen it hangs in a perpendicular position, as shown, the scale is balanced.

\V hat I claim is-- l. In a scale, the combinatiomwith a weighof two indexes rigidly arranged at right angles to each other, one of which is longitudinally adjustable to register with either of the gradur 5 ated plates, and a weight adjustable upon the other index, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

THOMAS H. HERNDON.

ing-platform and a scale-beam actuated thereby, of a dual indicator consisting of two indexes on the same rigid support, one of said indexes being longitudinally adjustable to enable it to register with either one of two concentric graduated scale-plates, substantially as described.

2. In a scale, the combination, with a platform and with the scale-beam actuated thereby, of a semicircular graduated plate having an outer quadrantal plate concentric with the semicircular plate, a dual indicator consisting Witnesses:

P. L. HERNDON, E. G. HERNDON. 

